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(12) Patent Application: | (11) CA 2401154 |
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(54) English Title: | FIRE SAFE CLOSURE RING SEAL SYSTEM FOR FLUG VALVES |
(54) French Title: | SYSTEME DE BAGUE DE FERMETURE ANTI-FEU POUR CLAPETS D'OBTURATION |
Status: | Deemed Abandoned and Beyond the Period of Reinstatement - Pending Response to Notice of Disregarded Communication |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : |
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(74) Agent: | KIRBY EADES GALE BAKER |
(74) Associate agent: | |
(45) Issued: | |
(86) PCT Filing Date: | 2001-02-23 |
(87) Open to Public Inspection: | 2001-09-07 |
Availability of licence: | N/A |
Dedicated to the Public: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | Yes |
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(86) PCT Filing Number: | PCT/US2001/005749 |
(87) International Publication Number: | WO 2001065156 |
(85) National Entry: | 2002-08-22 |
(30) Application Priority Data: | ||||||
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a seal system comprises a non-flat cross-section, fire resistant compressible
ring (44) and an annular pocket (42) formed between two engagting surfaces
(36, 38) of a pressure vessel such as a plug valve (10). The pocket is formed
by providing a chamfer (40) in one such surface (38) which is then enclosed by
the other such surface (36). The ring is compressed within the pocket to
substantially fill the pocket upon mating of the two surfaces.
L'invention concerne un système d'étanchéité comprenant une bague compressible résistant au feu, de section transversale non plane, et une poche annulaire constituée entre deux surfaces en prise d'un récipient à pression, par exemple un clapet d'obturation. La poche est réalisée par chanfreinage d'une de ces surfaces, laquelle surface se trouve alors incorporée dans l'autre. La bague est comprimée à l'intérieur de la poche de façon à remplir sensiblement cette dernière lorsque les deux surfaces s'épousent.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
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Description | Date |
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Inactive: IPC from MCD | 2006-03-12 |
Application Not Reinstated by Deadline | 2004-02-23 |
Time Limit for Reversal Expired | 2004-02-23 |
Inactive: Status info is complete as of Log entry date | 2004-01-07 |
Inactive: Abandoned - No reply to Office letter | 2003-11-25 |
Deemed Abandoned - Failure to Respond to Maintenance Fee Notice | 2003-02-24 |
Inactive: Courtesy letter - Evidence | 2002-12-10 |
Inactive: Cover page published | 2002-12-06 |
Inactive: Notice - National entry - No RFE | 2002-12-03 |
Application Received - PCT | 2002-10-10 |
National Entry Requirements Determined Compliant | 2002-08-22 |
Application Published (Open to Public Inspection) | 2001-09-07 |
Abandonment Date | Reason | Reinstatement Date |
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2003-02-24 |
Fee Type | Anniversary Year | Due Date | Paid Date |
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Basic national fee - standard | 2002-08-22 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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GENERAL VALVE, INC. |
Past Owners on Record |
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COLIN G. KNIGHT |
GENE T. KRUPALA |
GORDON M. SMITH |
JEFFREY R. CONLEY |
JOHN A. HOTZ |